2017•Austroads eBooksRequires access

Guide to Road Design Part 4A: Unsignalised and Signalised Intersections

Peter Aumann, M Whitehead

Abstract

Guide to Road Design Part 4A: Unsignalised and Signalised Intersections provides road designers and other practitioners with guidance on the detailed geometric design of all at-grade intersections (excluding roundabouts). This Part contains information for the design of signalised and unsignalised intersections. Guidance is provided on intersection sight distances, including approach sight distance, safe intersection sight distance, and minimum gap sight distance. Left and right turn treatments are outlined including the incorporation of auxiliary lanes at intersections and the use and size of traffic islands.

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Key concepts: Sight, Intersection (aeronautics), Geometric design, Transport engineering, Roundabout, Design elements and principles, Engineering, Computer science